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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#305375#6335. Belt Conveyordanielkou585511 71ms30252kbC++173.3kb2024-01-15 09:24:312024-01-15 09:24:32

Judging History

你现在查看的是最新测评结果

  • [2024-01-15 09:24:32]
  • 评测
  • 测评结果:11
  • 用时:71ms
  • 内存:30252kb
  • [2024-01-15 09:24:31]
  • 提交

answer

// Source: https://usaco.guide/general/io

#include "conveyor.h"

#include <iostream>
#include <vector>
#include <algorithm>
#include <map>
#include <set>
#include <queue>
#include <string>
#include <bitset>

// #define int long long
#define sz(x) (int) x.size()
#define all(x) x.begin(), x.end()

using namespace std;

// const int inf = (int) 1e9;

vector<vector<pair<int, int>>> adj;

vector<int> idx, parent, edge_idx;

void dfs(int c, int p, int e) {
	parent[c] = p;
	edge_idx[c] = e;

	for (auto n : adj[c]) {
		if (n.first != p) {
			idx[n.first] = (idx[c] + 1) % 3;
			dfs(n.first, c, n.second);
		}
	}
}

pair<int, int> combine(const pair<int, int> &a, const pair<int, int> b) {
	if (b.first > a.first) {
		return b;
	}

	return a;
}

void Solve(int N, vector<int> arr, vector<int> brr) {
	adj.resize(N); idx.resize(N); parent.resize(N); edge_idx.resize(N);

	for (int i = 0; i < N - 1; i++) {
		adj[arr[i]].push_back({brr[i], i});
		adj[brr[i]].push_back({arr[i], i});
	}

	for (int i = 0; i < N; i++) {
		// start from leaf
		if (sz(adj[i]) == 1) {
			dfs(i, -1, -1); break;
		}
	}

	vector<int> ans(N - 1, -1); // -1 means don't know

	while (true) {
		vector<int> ct(3, 0);

		pair<int, int> best = {0, 0};

		for (int i = 0; i < N; i++) {
			int tmp = 0;

			for (auto n : adj[i]) {
				tmp |= (ans[n.second] == -1);
			}

			if (tmp) tmp = 1;

			ct[idx[i]] += tmp;

			best = combine(best, make_pair(ct[idx[i]], idx[i]));
		}

		// query
		vector<int> xrr(N - 1, 0), yrr(N, 0);

		for (int i = 0; i < N; i++) {
			if (idx[i] == best.second) {
				yrr[i] = 1;
			}
		}

    	for (int i = 0; i < N; i++) {
      		if (yrr[i]) {
        		for (auto n : adj[i]) {
          			if (ans[n.second] == 0 && arr[n.second] == i) {
						xrr[n.second] = 1;
					}

          			if (ans[n.second] == 1 && brr[n.second] == i) {
						xrr[n.second] = 1;
					}
        		}
      		}
    	}

		vector<int> query = Query(xrr, yrr);

		for (int i = 0; i < N; i++) {
			if (!yrr[i]) {
				continue;
			}

			if (query[i]) {
				for (auto n : adj[i]) {
					if (xrr[n.second]) { // reversed
						if (n.first == brr[n.second]) {
							// a -> b reversed (b -> a) doesn't work
							ans[n.second] = 0;
						} else {
							// b -> a reversed (a -> b) doesn't work
							ans[n.second] = 1;
						}
					} else {
						// not reversed
						if (n.first == brr[n.second]) {
							// a -> b normal doesn't work
							ans[n.second] = 1;
						} else {
							// b -> a normal doesn't work
							ans[n.second] = 0;
						}
					}
				}
			} else {
				for (auto n : adj[i]) {
					if (query[n.first]) {
						if (xrr[n.second]) { // reversed
							if (n.first == brr[n.second]) {
								// a -> b reversed (b -> a) works
								ans[n.second] = 1;
							} else {
								// b -> a reversed (a -> b) works
								ans[n.second] = 0;
							}
						} else { // not reversed
							if (n.first == brr[n.second]) {
								// a -> b normal works
								ans[n.second] = 0;
							} else {
								// b -> a normal works
								ans[n.second] = 1;
							}
						}
					}
				}
			}
		}

		bool good = true;

		for (int i = 0; i < N - 1; i++) {
			if (ans[i] == -1) {
				good = false; break;
			}
		}

		if (good) {
			break;
		}
	}

	Answer(ans);
}

详细

Subtask #1:

score: 1
Accepted

Test #1:

score: 1
Accepted
time: 0ms
memory: 3776kb

input:

random1
2
0
1
1
0xC321A02965AC2640

output:

Accepted: 1

result:

ok correct

Test #2:

score: 0
Accepted
time: 0ms
memory: 4032kb

input:

random1
2
1
0
0
0x8A99AD9552B2C218

output:

Accepted: 1

result:

ok correct

Test #3:

score: 0
Accepted
time: 0ms
memory: 3784kb

input:

random1
2
1
0
1
0x024D21FA307D148D

output:

Accepted: 1

result:

ok correct

Test #4:

score: 0
Accepted
time: 0ms
memory: 3724kb

input:

random1
2
0
1
0
0x3C96AB23CEB63F75

output:

Accepted: 1

result:

ok correct

Subtask #2:

score: 0
Wrong Answer

Dependency #1:

100%
Accepted

Test #5:

score: 0
Wrong Answer
time: 0ms
memory: 4020kb

input:

priority
30
10 29 10 13 17 11 2 15 15 27 9 26 18 0 14 1 22 24 29 28 6 22 4 20 15 5 28 4 21
24 3 13 1 8 13 12 8 19 16 3 1 10 24 29 12 8 4 7 2 7 28 25 12 7 2 23 27 22
89058848 6377689 24189123 31671827 205117644 254374430 56016068 6819602 212866321 246625321 274047319 230485311 202854776 280075001 203...

output:

Wrong Answer [8]

result:

wrong answer Token "Wrong" doesn't correspond to pattern "Accepted:"

Subtask #3:

score: 10
Accepted

Test #11:

score: 10
Accepted
time: 58ms
memory: 29012kb

input:

random1
100000
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 9...

output:

Accepted: 4

result:

ok correct

Test #12:

score: 0
Accepted
time: 55ms
memory: 28912kb

input:

priority
100000
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 ...

output:

Accepted: 4

result:

ok correct

Test #13:

score: 0
Accepted
time: 37ms
memory: 30252kb

input:

random1
100000
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 9...

output:

Accepted: 3

result:

ok correct

Test #14:

score: 0
Accepted
time: 71ms
memory: 29048kb

input:

priority
100000
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 ...

output:

Accepted: 4

result:

ok correct

Subtask #4:

score: 0
Skipped

Dependency #1:

100%
Accepted

Dependency #2:

0%